Rah Book Reader is a free application developed by Majid Sharifi. It is an easy-to-use PDF reader that allows users to download and read online PDF documents and audiobooks on their iPhone and iPad. The app is designed to provide a seamless reading experience, with a simple and intuitive interface.

The app comes with a user-friendly interface that makes it easy to navigate through documents. Users can easily search for specific texts within documents and bookmark pages for future reference. The app also allows users to adjust the font size and background color, making it easier to read in different lighting conditions.

While the app currently only supports PDF documents and audiobooks, the developer has promised to add support for other formats, such as EPUB, in the near future. Overall, Rah Book Reader is a great choice for anyone looking for a simple and free PDF reader for their iPhone or iPad.